Bobbin-ejector for sewing-machine.



No. 808,502. PATENTED DEC. 26, 1905.

P. ANSOHUTZ. I

BOBBIN EJEGTOR FOR SEWING MACHINES.

APPLICATION FILED J'AN.10, 1905 E y-. Mm

Z SHEETSSHEET 1.

""No. 808.502. PATENTED DEC. 26, 1905.

P. ANSOHUTZ.

BOBBIN BJEGTOR FOR SEWING MACHINES.

APPLICATION FILED JAN. 10. 1905.

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uNrTnn STATES PATENT orrion.

PAUL ANSOHUTZ, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO GEORGEBIOKELHAUPT, OF NEW YORK, N. Y.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed January 10 1905- Serial No. 240409.

dle; and it relates more particularly to cer-' tain mechanism forreadily ejecting the bobbin and for holding the same in place in theoperation of the mechanism.

I have shown my invention as applied to a sewing-machine such as isdisclosed in my Letters Patent No. 766,130, "ranted July 26, 1904; butthis is not essential, as it can be used in connection with almost anytype of double-thread machine wherein a bobbin is employed, and so I donot limit myself to any such particular use.

"f. In the drawings illustrating my invention and forming part of thisapplication, Figure 1 is a side elevation of a sewing-machine embodyingmy improvements and disclosing so much of the stitch-forming mechanismas is necessary to understand the present improvement. This mechanism,however, is similar to that of the aforementioned patent and need not beparticularly described. Fig. 2 is a side view of the bobbin-ejectormechanism, similar to Fig. 1, but showing the bobbin-case in its openposition ready for the insertion of a bobbin. Fig. 3 is a top view ofthe same mechanism, showin the bobbin (in dotted line) in place and he dby the bobbin-case. Fig. 4 is a similar View to Fig. 3, but showing thebobbin removed and the parts open for the insertion thereof. Fig. 5 is aside elevation of the plunger for ejecting the bobbin. Fig. 6 is anenlarged detailed view of the top portion of the bobbin-case looking inthe direction of the arrow in Fig. 7. Fig. 7 is aside elevation, andFig. 8 an end view, of the bobbin-case. Fig. 9 is an enlarged sideelevation of said bobbin-case looking in the direction of the arrow atthe bottom of Fig. 6, and Fig. 10 is a similar enlarged detailed view ofthe bobbin-case, looking in the direction of the arrow at the side ofFig. 6. Figs. 6, 9, and 10, inclusive, illustrate more particularly theautomatic and practically self-threading tension device, which will bemore particularly described hereinafter.

In the drawings, as has been stated, Fig. 1

shows an end elevation of a complete mechanism, the essential partsindicated being a reciprocating needle-bar 1, carrying the needle 2, apresser-foot 3, and a feed mechanism 4. Below the needle-bar is locateda bobbin-carrying device comprising a bracket or frame 5, a recess 6 forthe bobbin-case 7, which latter is a substantially ring-shaped memberhaving a flat face or cross-bar 8 at its upper end and having a recess 9for the insertion of the bobbin 10. (Shownin dotted lines in Fig. 3.)The bobbin-retaining mechanism comprises a hinged bobbin-retainer or arm11, pivoted to a suitable portion of the bracket or frame 5, whichretainer has a foot or contact-surface 12, adapted to bear against thebobbin. A bell-crank lever or pivoted arm 14 is also movably mounted inthe bracket, and one end ofit is connected by a link 13 with thebobbin-retainer, and the other end, which is rounded, engages with aslot'on the stem of the bobbin-ejector 18, as will be hereinafter moreparticularly described. The bell-crank lever has a knuckle or projection17 adjacent to its pivoted portion, and this knuckle is adapted tocontact with a longitudinally-sliding rod 15, which is pressed inwardlyby the spring 16 and serves to control the bobbin carrier and ejectorand to retain the parts in either one of the positions shown in Fig. 3and Fig. 4. It will be seen that the bearing-surface of theretaining-arm 11 is slightly curved, and this will be found desirable,especially in cases where the bobbin has a slightly-convex shape. Theplunger or bobbin-ejector 18 is mounted in the bracket 5, so as to beseated in a small recess 19 beyond the bobbin when the latter is inplace, and an arm 20 on the lever 14, havin its end engaging the slot 21in the ejector, Forces the ejector against the bobbin, and therebyforces the latter out of place whenever the retainer 11 is swung back tothe position shown in Fig. 4. The plunger is of such size as to readilypass within the opening inthe bobbin-case 7 and in moving under theinfluence of the lever 14 forces the bobbin sufficiently out of thebobbin-case to eject it entirely therefrom.

When the bobbin is in place andit is desired to put the machine incondition for sewing, the thread must be placed underneath the tensiondevice, which is shown in Figs. 6 to 10, inclusive. The preferred formof this tension device comprises a spring 22, secured to the face of thecross-bar 8 of the bobbincase 7 (the parts being omitted in Figs. 7 and8 for the sake of clearness) by any suitable means, such as the screw23, and a small lug or hook 24 is attached to the lower part of saidcross-bar to assist in inserting and retaining the thread in the desiredposition. The device is easily threaded, it being only necessary to passthe bobbin-tl1read through the opening between the hook 24 and the edge25 of the bobbincase, then over the said hook and under the spring 22,where it enters the small recess 26 (see Fig. 6) and is fed therefromunder the propertension in the operation of the machine. Upon thepassage of the needle-thread around the bobbin and bobbin-case, asoccurs in the operation of the machine, the free end of thebobbin-thread as it passes from the recess 26 is looped by theneedle-thread and drawn up, and thus becomes part of the stitch. I-haveomitted to illustrate in the drawings either of the threads mentioned,as the operation thereof will be readily understood from an examinationof the patent previously men tioned and as such illustration would butserve to confuse the mind.

It is obvious that many modifications and changes may be made in myinvention with out departing from the spirit thereof, and I do not limitmyself to the particular forms shown and described; but I What I claim,and desire to secure by Letters Patent, is

1. In a bobbin-ej ector for sewing-machines, the combination of amovable bobbinretain ing device, a movable ejector, connecting meansbetween said retaining device and ej ector and a spring-operatedmechanism associated with the connecting means for controlling andholding'said bobbin-ejector and retaining device, substantially asdescribed.

2. In a bobbin-ej ector for sewing-machines, the combination of apivoted bobbin-retaining device, a movable bobbin-ejector, con-' nectingmechanism between the same, 1ncluding a pivoted lever having a knucklethereon, and a spring operating in conjunction with the knuckle andlever to control said retaining device and said ejector, substantiallyas described.

3. In a bobbin-ej ector for sewing-machines, the combination of amovable bobbin-retain ing device, a plunger-operating ejector normallyforming a part of the bobbin-retaining means, connecting means betweensaid retaining device and said ejector, and a springoperated mechanismassociated with the connecting means for controlling said retainingdevice and said ejector, substantially as described.

4. In abobbin-ej ector for sewing-machines, the combination of a pivotedbobbin-retaining device, a plunger-operating ejector, a bellcrank leverone end of which engages a slot in the stem of the ejector, meansconnecting the other end of the bell-crank lever withthe retainingdevice, and springoperated means for controlling said retaining deviceand ejector, substantially as described.

5. In abobbinejector for sewing-machines, the combination of a pivotedbobbin-retaining device, a plunger-operating ejector, a bellcrank leverone end of which engages a slot in the stem of the ejector, meansconnecting the other end of the bell-crank lever with the retainingdevice, a knuckle on said bell-crank lever, a plunger-rod contactingwith said knuckle and a spring engaging with said rod, substantially asdescribed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

PAUL ANSCHUTZ. Witnesses: I

HENRY M. TURK, ADoLPH -F. DINSE.

